Can you show me a picture I've never seen one . I understand negative pressure ect. But I've never seen ine

A picture of what? An evac pump or? The setups are all different depending on what it is for, what kind of setup it is (home rigged or store bought purpose-built) and the budget for building it.

On an engine as small as yours, something as small as the electric caddy pump hooked up to your crankcase should provide enough suction to make a difference. Whether that difference is enough to affect your oil consumption or not, well, that's the test.

EDIT:

This is the "inexpensive" evac setup. It is also illegal for street use (uses the exhaust). It uses the scavenging of the exhaust (ports in the headers) to draw the gasses out of the crankcase and create vacuum.